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IndexKeysDefinitionExtensionsGeoHaystackTDocument Method (IndexKeysDefinitionTDocument, FieldDefinitionTDocument, FieldDefinitionTDocument)

Note: This API is now obsolete.

Combines an existing index keys definition with a geo haystack index key definition.

Namespace:  MongoDB.Driver
Assembly:  MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.20.0+ee01960089f28ea1b501690df5fc9f6318a70242
Syntax
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[ObsoleteAttribute("GeoHaystack indexes were deprecated in server version 4.4.")]
public static IndexKeysDefinition<TDocument> GeoHaystack<TDocument>(
	this IndexKeysDefinition<TDocument> keys,
	FieldDefinition<TDocument> field,
	FieldDefinition<TDocument> additionalFieldName = null
)

Parameters

keys
Type: MongoDB.DriverIndexKeysDefinitionTDocument
The keys.
field
Type: MongoDB.DriverFieldDefinitionTDocument
The field.
additionalFieldName (Optional)
Type: MongoDB.DriverFieldDefinitionTDocument
Name of the additional field.

Type Parameters

TDocument
The type of the document.

Return Value

Type: IndexKeysDefinitionTDocument
A combined index keys definition.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IndexKeysDefinitionTDocument. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
See Also